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// Inferno utils/5l/asm.c
// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/5l/asm.c
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
// Portions Copyright © 1997-1999 Vita Nuova Limited
// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
// Portions Copyright © 2004,2006 Bruce Ellis
// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
// Portions Copyright © 2016 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package mips
import (
"cmd/internal/objabi"
"cmd/internal/sys"
"cmd/link/internal/ld"
"cmd/link/internal/sym"
"debug/elf"
"fmt"
"log"
)
func gentext(ctxt *ld.Link) {
return
}
func adddynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool {
log.Fatalf("adddynrel not implemented")
return false
}
func elfreloc1(ctxt *ld.Link, r *sym.Reloc, sectoff int64) bool {
ctxt.Out.Write32(uint32(sectoff))
elfsym := r.Xsym.ElfsymForReloc()
switch r.Type {
default:
return false
case objabi.R_ADDR:
if r.Siz != 4 {
return false
}
ctxt.Out.Write32(uint32(elf.R_MIPS_32) | uint32(elfsym)<<8)
case objabi.R_ADDRMIPS:
ctxt.Out.Write32(uint32(elf.R_MIPS_LO16) | uint32(elfsym)<<8)
case objabi.R_ADDRMIPSU:
ctxt.Out.Write32(uint32(elf.R_MIPS_HI16) | uint32(elfsym)<<8)
case objabi.R_ADDRMIPSTLS:
ctxt.Out.Write32(uint32(elf.R_MIPS_TLS_TPREL_LO16) | uint32(elfsym)<<8)
case objabi.R_CALLMIPS, objabi.R_JMPMIPS:
ctxt.Out.Write32(uint32(elf.R_MIPS_26) | uint32(elfsym)<<8)
}
return true
}
func elfsetupplt(ctxt *ld.Link) {
return
}
func machoreloc1(arch *sys.Arch, out *ld.OutBuf, s *sym.Symbol, r *sym.Reloc, sectoff int64) bool {
return false
}
func applyrel(arch *sys.Arch, r *sym.Reloc, s *sym.Symbol, val *int64, t int64) {
o := arch.ByteOrder.Uint32(s.P[r.Off:])
switch r.Type {
case objabi.R_ADDRMIPS, objabi.R_ADDRMIPSTLS:
*val = int64(o&0xffff0000 | uint32(t)&0xffff)
case objabi.R_ADDRMIPSU:
*val = int64(o&0xffff0000 | uint32((t+(1<<15))>>16)&0xffff)
case objabi.R_CALLMIPS, objabi.R_JMPMIPS:
*val = int64(o&0xfc000000 | uint32(t>>2)&^0xfc000000)
}
}
func archreloc(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val *int64) bool {
if ctxt.LinkMode == ld.LinkExternal {
switch r.Type {
default:
return false
case objabi.R_ADDRMIPS, objabi.R_ADDRMIPSU:
r.Done = false
// set up addend for eventual relocation via outer symbol.
rs := r.Sym
r.Xadd = r.Add
for rs.Outer != nil {
r.Xadd += ld.Symaddr(rs) - ld.Symaddr(rs.Outer)
rs = rs.Outer
}
if rs.Type != sym.SHOSTOBJ && rs.Type != sym.SDYNIMPORT && rs.Sect == nil {
ld.Errorf(s, "missing section for %s", rs.Name)
}
r.Xsym = rs
applyrel(ctxt.Arch, r, s, val, r.Xadd)
return true
case objabi.R_ADDRMIPSTLS, objabi.R_CALLMIPS, objabi.R_JMPMIPS:
r.Done = false
r.Xsym = r.Sym
r.Xadd = r.Add
applyrel(ctxt.Arch, r, s, val, r.Add)
return true
}
}
switch r.Type {
case objabi.R_CONST:
*val = r.Add
return true
case objabi.R_GOTOFF:
*val = ld.Symaddr(r.Sym) + r.Add - ld.Symaddr(ctxt.Syms.Lookup(".got", 0))
return true
case objabi.R_ADDRMIPS, objabi.R_ADDRMIPSU:
t := ld.Symaddr(r.Sym) + r.Add
applyrel(ctxt.Arch, r, s, val, t)
return true
case objabi.R_CALLMIPS, objabi.R_JMPMIPS:
t := ld.Symaddr(r.Sym) + r.Add
if t&3 != 0 {
ld.Errorf(s, "direct call is not aligned: %s %x", r.Sym.Name, t)
}
// check if target address is in the same 256 MB region as the next instruction
if (s.Value+int64(r.Off)+4)&0xf0000000 != (t & 0xf0000000) {
ld.Errorf(s, "direct call too far: %s %x", r.Sym.Name, t)
}
applyrel(ctxt.Arch, r, s, val, t)
return true
case objabi.R_ADDRMIPSTLS:
// thread pointer is at 0x7000 offset from the start of TLS data area
t := ld.Symaddr(r.Sym) + r.Add - 0x7000
if t < -32768 || t >= 32678 {
ld.Errorf(s, "TLS offset out of range %d", t)
}
applyrel(ctxt.Arch, r, s, val, t)
return true
}
return false
}
func archrelocvariant(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, t int64) int64 {
return -1
}
func asmb(ctxt *ld.Link) {
if ctxt.Debugvlog != 0 {
ctxt.Logf("%5.2f asmb\n", ld.Cputime())
}
if ctxt.IsELF {
ld.Asmbelfsetup()
}
sect := ld.Segtext.Sections[0]
ctxt.Out.SeekSet(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff))
ld.Codeblk(ctxt, int64(sect.Vaddr), int64(sect.Length))
for _, sect = range ld.Segtext.Sections[1:] {
ctxt.Out.SeekSet(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff))
ld.Datblk(ctxt, int64(sect.Vaddr), int64(sect.Length))
}
if ld.Segrodata.Filelen > 0 {
if ctxt.Debugvlog != 0 {
ctxt.Logf("%5.2f rodatblk\n", ld.Cputime())
}
ctxt.Out.SeekSet(int64(ld.Segrodata.Fileoff))
ld.Datblk(ctxt, int64(ld.Segrodata.Vaddr), int64(ld.Segrodata.Filelen))
}
if ctxt.Debugvlog != 0 {
ctxt.Logf("%5.2f datblk\n", ld.Cputime())
}
ctxt.Out.SeekSet(int64(ld.Segdata.Fileoff))
ld.Datblk(ctxt, int64(ld.Segdata.Vaddr), int64(ld.Segdata.Filelen))
ctxt.Out.SeekSet(int64(ld.Segdwarf.Fileoff))
ld.Dwarfblk(ctxt, int64(ld.Segdwarf.Vaddr), int64(ld.Segdwarf.Filelen))
/* output symbol table */
ld.Symsize = 0
ld.Lcsize = 0
symo := uint32(0)
if !*ld.FlagS {
if !ctxt.IsELF {
ld.Errorf(nil, "unsupported executable format")
}
if ctxt.Debugvlog != 0 {
ctxt.Logf("%5.2f sym\n", ld.Cputime())
}
symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
symo = uint32(ld.Rnd(int64(symo), int64(*ld.FlagRound)))
ctxt.Out.SeekSet(int64(symo))
if ctxt.Debugvlog != 0 {
ctxt.Logf("%5.2f elfsym\n", ld.Cputime())
}
ld.Asmelfsym(ctxt)
ctxt.Out.Flush()
ctxt.Out.Write(ld.Elfstrdat)
if ctxt.Debugvlog != 0 {
ctxt.Logf("%5.2f dwarf\n", ld.Cputime())
}
if ctxt.LinkMode == ld.LinkExternal {
ld.Elfemitreloc(ctxt)
}
}
if ctxt.Debugvlog != 0 {
ctxt.Logf("%5.2f header\n", ld.Cputime())
}
ctxt.Out.SeekSet(0)
switch ctxt.HeadType {
default:
ld.Errorf(nil, "unsupported operating system")
case objabi.Hlinux:
ld.Asmbelf(ctxt, int64(symo))
}
ctxt.Out.Flush()
if *ld.FlagC {
fmt.Printf("textsize=%d\n", ld.Segtext.Filelen)
fmt.Printf("datsize=%d\n", ld.Segdata.Filelen)
fmt.Printf("bsssize=%d\n", ld.Segdata.Length-ld.Segdata.Filelen)
fmt.Printf("symsize=%d\n", ld.Symsize)
fmt.Printf("lcsize=%d\n", ld.Lcsize)
fmt.Printf("total=%d\n", ld.Segtext.Filelen+ld.Segdata.Length+uint64(ld.Symsize)+uint64(ld.Lcsize))
}
}